Duplicating machine



Sept. 3, 1929. J, G. KlNGs DUPLICATING MACHINE Filed Feb. 27. 1928 2 Sheets-Shea?,

Sept. 3, 1929. J. G. KINGS DUPLICATING MACHINE Filed- Feb. 27, 1928 2 Sheets-Sheet Patented Sept, 3, 1.929.

' JOHN GEORGE KINGS,

A'PATENT OFFICE.

OF RUGBY, ENGLAND.

DUPLICATING MACHINE.

r Application filed February 27,1928, Serial No.

This invention relates to duplicating machines for printing circulars, lettersand the like and it has for its primary object to provide a portable hand operated machine of improved and extremely simplified construction.

According to this invention the imp-roved duplicating or printing machine comprises a perforated hollow cylindrical roller' of metal or other material mounted to turn against the action'of spring means with respect to a shaft adapted to be connected to a frame or handle, the said roller beingv adapted to permit a perforated stencil to be passed over the same and detachably secured thereto, and an inking roller carried by ,the said shaft, the said inking roller being carried by the said shaft in a manner to be yieldable relativelyY thereto, and/or the sald shaft being so mounted as to be yleldable with respect to the perforated roller to permitof the inking roller being held yieldingly relatively tothe inner face of the said perforated roller. a

In order that the -said invention may be clearly Iunderstood and readily carried into effect the same will now be described more fully, by way of example, with reference` to the accompanying diagrammatic drawings,

l inl which Figure 1 is an end elevation of a duplicating or printingvmachine embodying the invention,

Figure 2 is a longitudinal section taken on the line -m, of F igureA l, a

Figure 3 is a cross-section taken on the line y-y, of Figure 2, and

Figure 4 is an inverted plan view.

Referring to the drawings, the machine` 40 comprises a perforated hollow cylindrical rollera which may be of any suitable construction,the'said roller being adapted to be moved angularly relatively. t0 a shaft b, against the Jaction of spring means, such as Ithe spiral'springs c, see particularlyFigures 2 and 3, for returning the rollerI to normal position after each operation. The said springs are each` secured at one end thereof to the shaft b and at the other end to a cor- .5o responding end wall d ofthe roller, the end walls also having' securedthereto protecting casings orfcovers 'e for the springs. The nds of the shaft b extend beyond the end alls of the roller a and are reduced to pro- 'de diametrically opposed fiat faces to coo erate with the slotted ends f, see particu- 257,415, and in Great Britain March 18, 1927.

larly Figure l, of a yoke, or the like g, having a centrally disposed handle z, secured thereto to permit the roller to be manipulated, the slotted ends of the yoke 'affording a convenient means for enabling the manipulating handle and relative parts to be readily attached' to or detached from the shaft b. The reduced ends lof the said shaft are also screwthreaded for the reception of nuts i to secure the yoke g and -handle it detachably to the shaft. The circumferential surface of the roller a is shown interrupted at j to form a longtiudinal, gap or opening affording access to the interior of the said roller. if: denotes the stencil and Z a sheet of felt or textile material arranged preferably between the stencil and the roller a. The said sheet ZA may be detachably secured as by means of longitudinal bars myn, engaging corresponding loops at the ends of the sheet, the bar m co-operating at the ends thereof with slotted elements o secured to the end walls'v of the roller a, the said bar having turned-up end portions p to prevent longtiudinal move- The bar n is provided with eyes g, and lugs 1^ lor the'like are secured to the roller a, through which screwss are passed and engaged by nuts t. The stencil v may be detachably secured in position as by means of the heads of spaced studs u secured to the bar m and passed through holes in the loop of the sheet Z*t with which the bar m engages, and through corresponding holes lv in the stencil adjacent to one end thereof, the other end of the stencil being conveniently secured as by means of a clampin bar w having the ends z thereywill force or cause the ink to pass through the perforations in the roller a and through the porous wax stencil la. In lieu of, or in addition to, the adjustable means above described with'reference to the inking roller a', the said roller may be yieldably supported as by means of rubber or other resilient 80 ment of the bar with respect to the roller a. Y

ico

rings (not shown) disposed around the shaft bearings d and held in position by cover/ plates or the like attached to the end walls of the perforated roller a, the flanges on the bearings d', in the example shown, bein preferably dispensed with, and the roller a being carried by projecting arms or the like associated with the shaft for the roller a, the arrangement being such that downward pressure on the handle when the device is eing used will cause the roller a to be pressed resiliently against the inner surface of the perforated roller a. The roller a may be felt covered to hold the ink, or in some cases a felt or a plain rubber or like roller may be employed in conjunction with the sheet l of felt or textile material arranged between the waxed stencil Ic and the perforated cylindrical roller a. Suitable limiting stops may be provided either on the roller a, or on the means for manipulating the device, to determine the angular movement of the roller a. The roller a is shown provided at Figure 3 with longitudinal strips e of felt or the like, which strips may co-operate with the inking roller a and serve as stops or cushions therefor.

It will thus be manifest that by the present invention, there is provided a simple device which will serve all the purposes of the costly machines at present commonly employed for duplicating letters or the like.

1. A portable printing machine comprising a hollow perforated roller adapted to have ink forced through the perforations and adapted to carry a stencil, a shaft extending axially of the roller and centrally offset from the axial plane within the roller, an inking roller for cooperation with the inner surface of the perforated roller to force the through the perforations, a resilient connection between theY inkingroller and the offset portion of the shaft, and means carried by the shaft for adjusting the tension of the resilient connection.

2. A portable printin machine comprising a hollow perforated roiller adapted to have ink forced through the perforations and adapted to carry a stencil, a shaft extending axially of the roller and centrally offset from the axial plane within the roller, an inking roller for cooperation with the inner surface of the perforated roller to force the ink through the perforations, a spring strip secured to the odset portion of the shaft and terminally supporting the inking roller, and screws threaded in the oiset portion of the shaft and bearing on said spring strip to provide for varying the pressure of the inking roller on the inner surface of the hollow roller.

3. A portable printing machine comprising a hollow perforated roller adapted to have ink forced through the perforations and adapted to carry a stencil, a shaft extending axially of the roller and centrally offset from the axial plane within the roller, an inking roller for cooperation with the inner surface of the perforated roller toY force the ink through the perforations, a handle connected to said shaft to cause angular movement of the hollow roller when in contact with the surface and under operating pressure on the handle, and a spring connection between the hollow roller and shaft tensioned in the operating movement of the hollow roller to return the hollow roller tornormal position on release f the operating pressure.

In testimony whereof I have hereunto s' ed m name.

lgn y J. G. KINGS; 

